Lathe



NTED STATES JOHN COOK, OF BUFFALO, NEW' YORK.

LATI-IE.

Specification of Letters Patent No. 27,696, dated April 3, 1860.

To all whom it may concern:

Be itknown that I, JOHN Coon, of Buffalo, in the county of Erie and State of New York, have invented a new and Improved Machine for Manufacturing or Forming Polygonal- Shaped Articles, such as Legs for Furniture and Musical Instruments, Newels for Balusters, &c.; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a front elevation of my invention. Fig. 2, a transverse vertical section of ditto, taken in the line y, y, Fig. l. Fig. 3, a transverse vertical section of one of the cutter-heads, taken in the line s, a, Fig. 2.

Similar letters of reference, indicate corresponding parts in the several figures.

To enable others skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents a rect-angular frame on the upper part of which a turning lathe B is placed. The bed a, of this turning lathe is allowed to slide back and forth on the frame A, said bed being properly fitted on longitudinal ways or guides b, b, on the frame A. On the bed a, the two heads c, d, are placed. One head c, being provided with a mandrel e, and the other with a rod f, having a center point at its end. The mandrel e, is driven by a belt g, from a drum C, at the lower part of the frame A, the mandrel e, having an idle pulley L, on it and a working pulley i, so that the mandrel may be rotated or kept stationary as desired with a constant movement of the belt g.

On the mandrel e, of the lathe B, there is a circular plate j, the edges of which are notched to receive the lip 7c, of a lever D,

said lever being connected with a fulcruin rod Z, which is allowed to turn in the head c. This lever D, has a spring E, bearing against its under side, said spring having a tendency to keep the lip 7c, in any of the notches of plate j. This will be fully understood by referring to Fig. 3. To the bed a, a hook m, is attached, said hook, when necessary, securing down the outer part of the lever D, and keeping the lip 7c, elevated free from the notches of the plate y'.

The lathe B, is constructed similarly to an ordinary turning lathe, the only difference being the sliding feature of the bed a,

y and the circular notched plate j, with its stop or holding lever D.

To the back side of the bed a, of the lathe a pattern F, is attached. This pattern may be constructed of a metal plate, and its upper edge is formed or shaped to correspond with a longitudinal profile of the work to be produced by the machine. This will. be seen by referring to Fig. 1, in which a piano leg is shown (in red) secured in the lathe B, and the pattern is shown corresponding to the longitudinal profile of the leg.

On the upper part of the frame A, a shaft m, is placed. The shaft is driven by a belt n, from the driving shaft G, of the machine, from which shaft the drum C, is also driven by a belt o. On the frame A, below the shaft m, there is a shaft p, on the inner end of which a pinion Q is secured, said pinion gearing\into a rack r, at the under side of the lathe bed a, as shown clearly in Fig. 3.

On the shaft p, two pulleys s, t, are placed loosely, and either of these pulleys are connected with the shaft p, by means of a clutch u, which has a lever H, attached to it. Around the pulley s, a straight belte, passes and a cross belt w, passes around the pulley zi.

I, is an upright sash or gate which is fitted between two uprights a', av, on the frame A, and allowed to work freely up and down between said uprights. In this sash or gate T, a horizontal shaft J, is placed, said shaft being driven by a belt b, from the driving shaft Gr. On one end of the shaft J, a planer K, is attached. This planer is simply a head with straight cutters c, attached. The planer K, projects over the stick to be operated on and which is centered in the lathe B.

On the frame A, there is secureda three sided upright case or socket L, to which a box M is fitted by a loop or guide d; in the upper part of the box M, a gouged shaped turning tool N, is secured by a set screw e', as shown clearly in Fig. 2; in the lower part of the box M, a bar f, is placed, an end of which is rounded at its bottom, and rests on the pattern F, as shown clearly in Fig. 2. Through the bar f', two screw rods g', g', pass, said rods working in internal screw threads in bar f, and on each screw-rod a pinion L is placed. The pinions It, h, both gear into a pinion c, on a shaft o, which has its bearings attached to one side of the box M, as shown clearly in Fig. 4.

To the lower part of the sash or gate I, at one side a short bar P, is attached by a e' .,V set screw y sald screw passlng through a slot la', in the bar P, which slot admits of the bar being raised or lowered as occasion may require.

The operation is as follows: The stick to be operated on is centered in the lathe B, and the latter is moved to the right until the bar f, rests on the end of the patern F. The outer part of the lever D, is secured down by the hook m, so that the lip c, of the lever will be free from the plate y'. The pulley s, is then connected with the clutch u, and the turning tool N, in the boX M, is adjusted to the desired height by turning the shaft o, the boX M, being raised or lowered by turning said shaft and consequently the tool N, will be correspondingly moved. The sash or gate I, is shoved upward until the planer K, will be free from the stick. The parts being adjusted, power is applied to the shaft Gr, and the stick in the latter is rotated through the medium of the belt g, the tool N, acting upon the stick. As the stick is turned the lathe is moved gradually to the left, as indicated by the arrow 1, in Fig. l, and the tool N, will be raised and lowered by the pattern F, and the former will consequently turn the stick in a form, the longitudinal profile of which, will correspond to the pattern F; when the stick is turned, the shaft Gr, is stopped, its driving belt being thrown on a loose ulley, the tool N is elevated, the belt g, thrown on the idle pulley L, of the lathe, the sash or gate I, is then lowered, so that its bar P will rest on the pattern F, and the planer K rests on the turned stick. The pulley t, is then connected with the shaft p, the pulley s, being liberated from it, and the lever D, is relieved from the hook m, so that the lip 7c, will catch into one of the notches of the plate j, and prevent the turned stick from rotating. Power is then again applied to the shaft G, and the lathe B, is moved in the direction indicated by arrow 2, the planer K, which is rotated from the shaft G, by the belt b acts on the stick and cuts a plane surface thereon the whole distance of its length. The stick is then turned a certain distance to allow the lip is, of the lever to catch into another notch of plate j, and the pulley s, being again connected to the shaft p, and the pulley liberated, thelathe is moved, and a succeedingplane surface cut. This operation is repeated until the stick is cut in polygonal form. The planer K, is regulated, so as to have a proper position relatively with the stick by adjusting the bar P.

I do not claim a pattern in connection with a lathe, for turning and cutting articles in polygonal form, for said parts have been previously used although arranged differently from the plan herein shown; but,

I do claim as new and desire to secure by Letters Patent- Placing the turning tool N, in a slidingboX M, operated by the shaft 0, screw rods g, g, and bar f for the purpose of readily adjusting the turning tool with the stick, and perlnitting the tool to be operated by the pattern as described.

JOI-IN COOK.

Witnesses CHAs. E. BACON, Trros. F. THORNTON. 

